Game Crashing with Sound Mix??

Assertion failed: IsValidIndex(Index) [File:D:\Build++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Core\Public\UObject/NameTypes.h] [Line: 355] IsValidIndex(6357110)

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:414]
UE4Editor_Core!FName::GetDisplayNameEntry() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:897]
UE4Editor_Core!FName::ToString() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:919]
UE4Editor_Core!FName::ToString() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:910]
UE4Editor_CoreUObject!UObjectBaseUtility::GetName() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\coreuobject\public\uobject\uobjectbaseutility.h:355]
UE4Editor_Engine!FAudioDevice::RecursiveApplyAdjuster() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:1709]
UE4Editor_Engine!FAudioDevice::ApplyClassAdjusters() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:2126]
UE4Editor_Engine!FAudioDevice::UpdateSoundClassProperties() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:2221]
UE4Editor_Engine!FAudioDevice::Update() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:3222]
UE4Editor_Engine!TGraphTask::ExecuteTask() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:785]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:651]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:560]
UE4Editor_Engine!FAudioThread::Run() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\audiothread.cpp:160]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]